King Engine Bearings MB4556SX VS Main Bearings for 3.0L VM Motori EcoDiesel

Vehicle Fitment

• 2011-2020 Jeep Grand Cherokee 3.0L EcoDiesel (VM Motori A630/L630)
• 2010-2018 Chrysler 300C 3.0L CRD (VM Motori A630/L630)
• 2011-2014 Lancia Thema 3.0L D (VM Motori A630/L630)
• 2011-2019 Ram 1500 EcoDiesel (VM Motori 3.0L - select markets)

Features

• King SX-Series reinforced tri-metal main crankshaft bearings
• Copper-lead-nickel alloy for high-load diesel engine durability
• Grooved upper halves for improved oil distribution
• Precision machined to OEM main journal specifications
• Ideal for rebuilds, high-mileage overhauls, or heavy-duty use
• Enhanced wear resistance compared to standard bearings
• Accurate wall thickness control for stable oil film
• Oversize variants available for machined crank journals

Specifications

• Part Number: MB4556SX
• Brand: King Engine Bearings
• Series: SX-Series Main Bearings
• Engine Fitment: VM Motori A630/L630 3.0L V6 EcoDiesel
• Bearing Type: Main crankshaft bearings
• Material: Reinforced tri-metal copper-lead-nickel
• Quantity: 4 pairs (complete main bearing set)
• Upper Groove: Oil groove for improved lubrication

Included Components

• 4x Pair King SX-Series Main Bearings (Standard Size)

Product Description

The **King Engine Bearings MB4556SX** main bearing set is engineered as a **direct OE replacement** for the **VM Motori A630/L630 3.0L EcoDiesel V6** engine - a common powerplant in Chrysler, Jeep, Ram, and Lancia diesel vehicles. These SX-Series crankshaft bearings feature a robust **tri-metal copper-lead-nickel construction** with grooved upper halves to promote superior oil distribution and durability under heavy-load diesel conditions. The reinforced alloy design offers improved wear resistance over basic bearings, making it ideal for engine rebuilds, high-mileage repairs, or vehicles used in demanding environments.

This complete set includes four pairs of main bearings - one pair for each main journal - and is precisely machined to meet OEM dimensions and clearances. The grooved upper bearing halves help ensure proper lubrication flow around the crankshaft, which is critical for long service life in the **3.0L EcoDiesel** engine. If your engine block crank journals have been machined, **oversize bearing variants** (e.g., +0.25 mm, +0.50 mm) are also available to match post-machining specifications.